class
	BOOLEAN_REF

General
	cluster: base
	description: "References to objects containing a boolean value"

Ancestors
	HASHABLE*

Queries
	hash_code: INTEGER_32
	infix "and then" (other: [like Current] BOOLEAN_REF): BOOLEAN
	infix "and" (other: [like Current] BOOLEAN_REF): BOOLEAN
	infix "implies" (other: [like Current] BOOLEAN_REF): BOOLEAN
	infix "or else" (other: [like Current] BOOLEAN_REF): BOOLEAN
	infix "or" (other: [like Current] BOOLEAN_REF): BOOLEAN
	infix "xor" (other: [like Current] BOOLEAN_REF): BOOLEAN
	is_hashable: BOOLEAN
	item: BOOLEAN
	out: STRING_8
	prefix "not": [like Current] BOOLEAN_REF
	to_integer: INTEGER_32
	to_reference: BOOLEAN_REF

Commands
	set_item (b: BOOLEAN)

Constraints
	involutive negation
	non contradiction
	completeness